package com.atguigu.condition;

import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.annotation.Condition;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.env.Environment;
import org.springframework.core.type.AnnotatedTypeMetadata;

/**
 * @author 张晓
 * @create 2020-11-18 18:08
 * 判断是否是linux系统
 */
public class LinuxCondition implements Condition {
    /**
     *
     * @param context 判断条件能使用的上下文（环境）
     * @param metadata 注释信息
     * @return
     */
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        //是否是linux 系统
        //1.能获取到ioc使用的beanFactory
        ConfigurableListableBeanFactory beanFactory = context.getBeanFactory();
        //2.获取类加载器
        ClassLoader classLoader = context.getClassLoader();
        //3.获取当前环境信息
        Environment environment = context.getEnvironment();
        //4.获取到bean定义的注册类
        BeanDefinitionRegistry registry = context.getRegistry();
        //可以判断容器中的bean注册情况，也可以给容器中注册bean
        boolean person = registry.containsBeanDefinition("person");
        System.out.println(person);
        String property = environment.getProperty("os.name");
        if (property.contains("linux")) {
            return true;
        }
        return false;
    }
}
